Method for manufacturing plaited work



Sept. 5, 1933. a. BOCKMANN 5,

I MTHOD FOR MANUFACTURING PLAITED WORK Filed Nov. 14, 1931 PatentedSept. 5, 1933 UNITED STATES METHOD ron MANUFACTURING PLAI'I'ED won]:

Gustav Biickmann, Cologne-Mulheim, Germany,

, assignor to Franz Clonth, Rheinische GummiwarenfabrikAktiengesellschaft, Cologne, Germany, a corporation of GermanyApplication November 14, 1931, Serial No.

I 574,990, and in Germany December 2, 1930 2 Claim.

This invention relates to a method of manufacturing plaited work andplaiting implements therefor. I

It is evident that the handling of band-form,

unvulcanized rubber bodies is extremely diflicult on account of theirstickiness. For this reason it has not been possible heretofore tomanufacture plaited work from such band strips. It is the main object ofmy present invention to make it possible to manufacture such plaitedwork without difficulty and to make thereby a very cheap article,adapted to be used for different purposes.

The invention is based on the fact, that it is possible to place by farthe greater number of the bands adjacent one another and upon oneanother in the form of warp and weft, while avoiding the necessity ofdrawing these bands through one another, and that then only a few bandsneed to be drawn through in order to obtain perfectly regular plaitedwork, the individual" bands of which are absolutely firmly unitedtogether by subsequent vulcanization.

In a preferred form'of carrying out the process, a plaiting boardprovided with guide blocks thereupon and also a pul1through needle of U-shape cross section will be used. The guide blocks ensure not merely theexact positioning of the individual bands, but also produce through-wayopenings in the plaited work, the said openings being very advantageousin such plaited work.

As already said the new plaited work produced according to this processcan be used for many different purposes. For example, it can be used formats, rimners or the like, more particularly also as supporting surfacesfor beds and lounge furniture, instead of the spring wire mattresseshitherto employed, but this does not by any means exhaust the fields ofits application.

Referring to the accompanying drawing,

Figure 1 shows the new plaited work diagrammatically.

Figures 2 and 3 show in section and side elevation the pull-throughneedle and Figure 4 shows the plaiting board diagrammatically.

In the manufacture of the plaited work, the procedure will be such, forexample, that first of all the bands a a and a are set out on theplaiting board 0, whereupon on the said bands, there are placed thebands b b and 12, and in turn, on the latter, there are placed the bandsa and a Then, of the 10 bands shown, eight have already been placed inthe absolutely correct position relatively to one another, and only theIt is also an advantage of the invention that bands b and b* have stillto be drawn through, the troublesome work of drawing the bands throughbeing thus reduced to one fifth of the bands. The operation of drawingthe bands through is still-further substantially facilitated byinserting the sticky bands into the U-shaped pull-through needle, bymeans of which they can be drawn through very easily. The needle is thensimply withdrawn.

The guide blocks d provided on the plaiting board 0 produce openingsbetween the bands through which air can pass upwardly and dirt can passin the opposite direction.

Since the band strips are united together very intimately andpermanently, it is also possible to omit the plaiting and drawing of thestrips, the said strips being merely placed upon one another andvulcanized together after the manner of a fence.

the through-way openings are produced without any waste of material.

Apart from natural and synthetic rubber, rubber-like materials, such asgutta-percha, and balata, as well as textile materials which have beenimpregnated with one of these materials are also suitable for the newplaited work and its process of manufacture.

I claim:

1. A method for the manufacture of plaited 35 work consisting in thatfirst of all a number of unvulcanized bands are placed in spaced apart.relation adjacent to one another and upon one another in the directionof warp and weft, after which the remaining bands for completing theplaited work are drawn into the intermediate spaces and the formationthen vulcanized.

2. The method of making plaited work which consists in layingunvulcanized bands in spaced apart relation to form a warp, layingunvulcanized bands in spaced apart crossed formation above thepreviously placed bands to produce a weft, placing other bands in theintermediate spaces on top of the spaced weft formation, passing otherbands through the intermediate spaces of the weft formation so that saidbands are in alternate top and bottom contact with the successivelydisposed bands of the warp, and finally vulcanizing the crossingbands tounite the same.

GUSTAV BOQKMANN.

